Valve-lifting apparatus



Jan. 25 1927.

H. c. HUGHES VALVE LIFTING APPARATUS Fild April 4A, 19'25 jf @f PatentedJan. 25, 1927.

narran srarss HARRY C. HUGHES, OF CINCINNATI, OHIO.

VALVE-LIFTING APPARATUS.

Application filed April 4:, 1925. Serial No. 20,840.

My invention relates to apparatus 'for the lifting and removal et valves'tor grinding the same or valve renev-Jal. in automotive enn glues.

rlhe problem o'l' valve hitting and removal is al serious one inautomohile practice, hecanse of the eonlined space in which the operatorcan work, and the heavy tension or the springs, and the presence o'l'the valve litters operated hy the engine. y

lt is the object oft my invention to provide a mechanism and process-tor removing and replacing oit the usual valves 'tound in autol motiveengines at the present day, same particularly designed to facilitate theelevation o't the bottom retaining pan so that the valve key isavailable and the stem can he liitted clear out oit'the casing thatcontines it, and as readily inserted again. Q

The operator is provided with a ew simple implements which are easy toemploy, and among other things, I provide a threader for passing throughthe valve guide, which threader will hold and guide the spring, andretain the lower pan.

I accomplish my objects ley that certain construction and arrangement ofparts to he hereinafter more specifically pointed out and claimed.

In the drawings:

Figure 1 is a section showing a valve in place and seated.

V Figure 2 is a like view showing the valve raised. ley the lifting pinand with a retaining tool inserted beneath the pan.

Figure 3 is a like view showing the valve head released so as to lowerthe retaining pin.

Figure 4L is a like view showing the valve removed and the threaderholding the spring and pan in place, with the pan supported hy the tool.

Figure 5 is a perspective ot the tool.

Figure 6 is a perspective ot the threader Figure 'l' is a perspective eta modified threader.

Referring to the frame parts ci the motor in which the valve is locatedI have selected a simple Yform ot structure in which the valve seat 1 isin a wall 2 ot the machine casing, the guide 3 for the valve stem issup' ported between two welos 4 and 5, and the lifting pin is mountedand guided in a hess 6 of the casing. I have not shown the cam sha-ftoperation of the lifting pins, which is as customarily practiced inautomobile engines.

The valve is shown as having a head 7, a stem 8, and 'a key 9. This key9 holds a pan or dish shaped washer 10 in place against the 'torce olival compression spring l1, arranged around the valve stem and abutting atits upper end against the weh 5 of the valve stem guide.

rThe lifting pin 12 engages the lower end et the valve stem and in theoperation ol the engine raises the valve from its seat.

ln carrying out my process the iirst step is to revolve the engine crankshaft, tl'ierelrv causing the cam shaft to raise a selected valve stem.lVhen the stem is raised so that the valve is unseated, a tool Ta can heinserted under the head it an additional lift against the spring, andthereupon the retaining tool 13 is employed.

This tool is in the form of loar terminating in a U-shaped piece ofsuiiicient width, which is inserted under the pan on the valve stemresting against the hase of the boss 6, or resting at any otherconvenient point The U-.shaped end of the tool is open toward theoperator, engage the pan without engaging the valve stem or key.

The lifter which has propped up the valve head, is removed when the toolhas heen insert-ed, thereby permitting the valve stem to drop bygravity, and thereby exposing the key. The valve is turned around untilthe key is properly presented to the operator, who then reaches into theopen space lel't loy the tool, and pulls out the key.

The valve is then lifted clear out of the guide spring, and pan. Now thesmall end of the threader is pushed up through the pan, spring and valveguide occupying the normal position of the f'alve stem, Figure 4. Thethreader is lowered hack through valve guide and removed trom engine`together with spring and pan. Thereupon the grinding can proceedwithout interferY ence of the spring.

When the valve is to he replaced, the threader is also used. It is ystiff wire 141, having a knob 15 secured thereto which is of largerdiameter than the valve stem. The operator pushes the end 16 of the wireup through the pan and spring, and through the valve stem guide, so thathe can grasp the end 16 from above. A. loop formed of a Jairof the valveto give and is of suthcient diameter to 'I whereupon he can insert atthe end 16 will be convenient for handling.

The operator then pulls up on the threader to compress the springsui'liciently to permit the tool 13 to be inserted under the pan again,and pulls the threader back out of the Way. He then drops the valve intoplace with its end coming below the pan Within the open portion of theU-shaped tool piece,

the key, and remove the tool.

The simplicity of this operation Will at once recommend itself to anyoneWho has attempted to remove and grind the valves of an automobileengine.

If the threader is of the form of Figure 7, it can be dropped throughthe parts from above. The cable 30 of this structure has a ring 3l ofless size than the valve stem. When the ring 3l is dropped down throughthe parts, the pin 32 Will be set into the ring so as to prevent the panfrom slipping over the ring.

I am aware that it is old to block up the pan oil" a valve with a pieceof metal, so as to get at the key, but my tool is a device which can bereadily inserted and removed, and prevents the necessity of tumblingaround with a block .which may fall out of place, and in fact frequentlydoes do so.

Having thus described my invention, What I claim as new and desire tosecure by Letters Patent, is

l. A process of removing and replacing valves from internal whichconsists in iirst raising the valve rod to compress the spring, thenholding up the pan and spring on the valve rod and permitting the steinto drop in a manner that Will expose the key, then pulling out the key,and removing the valve, then replacing the valve by a stringer ruimingthrough the spring and pan and preventing the pan from coining oil' theStringer, passing the Stringer through the valve guide, and pulling itup to compress the spring, and iinally reversing the operations nowdescribed.

2. A method of replacing valves in in` ternal combustion engines whichconsists in passing a Stringer through the pan and spring, andpreventing the Stringer from pulling through the pan, passing theStringer through the valve stem guide, and pulling it up to compress thespring, blocking up the pan to hold it in elevated position, removingthe stringer, replacing' the valve stem to bring the key opening thereinbeloiv the pan, inserting the key and removing the blocking device,substantially as described.

HARRY C. HUGHES.

combustion engines

